93. There's no turning back.

依字面上来看，There's no turning back.就是「没有退路。」的意思，凡是遇到势在
必行，决定了就不能反悔的事情，都可以说There's no turning back.。说得文言一点
就是「背水一战」。

94. Time is always against us.

against就是「跟……相反，跟……作对」，所以Time is always against us.这句就
是「时间总是跟我们作对。」也就是在抱怨时间不够时，常常会脱口而说的一句话。例如答应老师放学前把作业交出来，没想到时光飞逝，转眼就放学了，这个时候你就可以感叹地说：Time is always against us.